Threading-die.



R. L. WILCUX.

THREADING DIE. APPLICATION 'mao AUG.23. I915.

1,232,875. PatentedJuly 10, 1917.-

a 31cm nnsrnniwrncox, or WATEBB RY. commander, assmdn 'IO Termite:EA-BBEL'FOUNDRY AND MACHINE COMPANY, OIE WATERBURY,T CQNNECT1T I ifcu'r; noongennrxonxorcommc'rrcnr. y v v.

H e y I I e mnEnnmG-nm; e I I e 1 ,'g33; 75; F specification ofLttersiatexgt. PatentedJulyI '10, 1917. c H Aj licationinean ustza,1915.@sfimmmtio. K

being ofisubstantially the same shape, differ mg only in their length,the fixed; die being longer than the movable d'i'e a-nd provided with aguide notch 3. j

t These diesl are secured in a the usual way in anyqone vof; the commonforms of thread rolling machine. Each diehas an angle recessvet in onevside thereof at an angle to the To all whom it mag concern:

\ Be it known that I, RICHARD LESTERWIL- cox,a citizen ofthe UnitedStates, residing I at Waterbury, in the county of New; Haven 5 andStateof'-(Jonnecticut, have, inventeda certain "new and ImprovedThreading-Die, of 'whichthe following is a specification, referencebeing hadtherein to the accompanyi'ng drawings. 7 top and bottomtandupon the-adjacent faces 10 My inventionwrelates to a new and imare theribsizwhich are parellelto the side proved die for pointing andthreading of the dies and terminate at their innertendsscrews,boltsandysimilar articles. a y at the edgeof 15116186655 4. I v eIt is the object of my invention, among The front face ofeach-of thedies is proother-things, toaproduce such dies, economi vided'with theusual thread rollingv grooves 1 15 cally designed to be,interchangeable, reversi- 6, which extend from the outeredges of the eble,and attachable to'any one of the many die to and upon one side'ofthe ribs forms {of thread rolling machines now in Fig, 2). I, I .7 I

, common use. i Secured within the recess 4, by a; screw 7, v f Tothese,-and 'other.ends, my-finyention isthe depthgagef8, hnving thelipl9 upon consists in the threading die -substantially" oneend-thereof. The depth gage. 8 isjso as fhereinafterdescribed andillustrated in shaped and designed'that its positiomwithy c theaccompanying drawing, wherein, in the recessm'ay bereversed ,endlforend- 75 I Figure lzis aplan view ofapair of thread if desired, and whichis; necessary ifnthe rolling, dies embodying my invention and dies arereversedso' that the lower sidebe occupying the :relativepositionsassumed comesYthe top side: and vice .versaQf, c a a a 1 bythem at the commencement of the thread The contact ,face 11 of thelip 19issli%ht1y rolling operation r I t I y curved to, allow .for -theelongation o the [Fig. 1215 a: perspective View ofone ofthe blank astheend thereofpasses over it. y dig v t. The dies l-and 2 are,sonrrangedgthat-then ribs-5 upon onedie movein the sameplane c astheiibs 5 upon-the oppositedie a edges thereof .have snbstantial co'ntaceach other during this movement; t

f "Fig. 3' is 'a' f a ceiv' '7 thereofwiththe g ig. In; practice, theblank,

a igs. 7, 8,9,.10 an ,1 e y I by the, numeral 1-10, is bIacedbetWeQn the1 tionel' 'views of the die and depth ge, with thebotto qta kenrespectively v upon .linesxAfB, D f

and E of Fig-3,1 wit the. blank shown in connection therewith; Q

1215 a fragmentary plantview of one y' shown of theldi'e s and depthgage with'the blank guide notch 31 1101; essentl inzzc tact therewith! etion ofvthe deyice L,

i He ofore gimleft point screws have, been "pndu by firstpointingv theblank in at sh'av g machine, ,Iatheor similarfrnechw v v fnism endafterward forming the? thread is rolled n'pon th but in" my improved mth[the thehea d (10W h lanks' arepointed and.threaded,atone' "nd. 1"theeemetime'andwithoutthe loss of any; Ymatcriahas is necessary underthe ol'dn'practhedrawings, the numeral lTdesi-gnates the; film e, and; 1the movable die, :both

tion in the opposite direction, until the threads are substantiallycompleted and the blank is at that part of the die substantiallydesignated by the line C in Fig. 3 and as illustrated in Fig. 9.At-about this time the lower end of the blank is brought into contactwith the ribs 5 and the elongated portion thereof is tapered by reasonof its contact therewith and is pointed substantially as shown in Fig.11. Durmg this pointing operation the grooves in the side of the ribs 5roll the thread on the screw until the completed blank is formed at thatthrough the thread rolling operation. This is wasted elongation of theblank continues while the thread is bein rolled on the pointed portion,thus fac itating the pointing operation.

'If the metal in the blank is of such a nature that it will not flow byreason of the thread rolh'n operation, the blank is placed between edies for substantially its full length, instead of slightly shorter,

as is the case with the blank composed of metal ca able of flowinfreely.

It w'i' be observed t at in the embodiment of my invention, as hereindescribed, gimlet pointed screws or bolts are ointed and threadedwithout waste of material, and the old ointing operation whereinmaterial is eliminated.

Inv minor details my, new and improved threading dies may be altered andI do not therefore limit myself to a' die construct ed exactly as shownand described exceptas the scope of'the claims requires.

Hav ng described my invention, what I claim as new and desireto secureby Letters Patent,is:

F' L'In combination, a thread rolling die, having a groovedface and aprojecting rib, upon said face, and a depth gagemovably connected withsaid die.

2. In emanation, a thread rolling die, having a grooved faceand aprojecting rib upon said face said grooves extending into oneside of sairib; and a depth gage mov ahlyfconnected with said die.

""3.- A' thread rolling die, 'havin-g a' rem u in: ihe themf ribsgswmdrdieaa iacent to'said mvthm was mac" face or ea adjacdnt' as ac, recess and extending one side pf or am jate'ntm be omen: assemmftleflofiinlhioner ornate,

in the face thereof, r1

tending) in combination with a depth gage mounted in said recess.

4. A thread rolling die, having an inclined recess inthe face thereof; arib upon the face of'said die upon each side 'of said reces and at an 1ethereto; thread rollin'g grooves in sai face adjacent to said recess andextending into one side of each of said ribs, in combination with adepthgage mounted in said recess.

5. A thread rolling die, havi a recess in the face thereof; l'lbS uponsai face adjacent to said recess and shorter than the die, threadrolling grooves in said face adjacent to said'recess and extending intoone side of each of said ribs, in combination with a depth gagemounted'in said recess.

6. A thread rolling die, havin a recess in the face thereof, IlbS uponsai face adjacent to said recess, thread rolling grooves 1n said faceadjacent to said recess and extendi into one side of each of said ribs,in com ination with a depth gage mounted in said recess, said depth gagehaving a projectirig lip thereon.

7. thread rolling die, hav' a recess in the face thereof, I'lbS upon saiface adjacent to said recess, thread rolling grooves in said faceadjacent to said recess and extendingJ into one side of each of saidribs, in com ination with a depth gage mounted in said recem, said depthgage having a projecting lip thereon with one curved edge 8. A threadrolling die, having a recess in the face thereof; ribs upon said faceadjacent to said recess and shorter than the die, thread rolling groovesin said face adjacent to said recess and extending into one side of eachof said ribs, in combination with a depth gage mounted in said recess;and means for adjustably securing said depth gage'to said die. 7 j r 9.A thread rollin 'die having a recess in one face thereof e side wall ofwhich is at an an leto the side of the die, a rib upon said ace adjacenttosaid side wall, thread rolling, grooves in said face adjacent to ,saidrecess'and extending into one side of said rib, in combination with adepth 7 gage mounted in saidrecess. V

10. A thread rollin die, havin a recess upon sai face adjacent to saidrecess, thread rollinggrooves in said face adjacent to" said recessandlexinto one side of each of said ribs, in com ination with a depthgage mounted in said recess, said depth gage having a proecting ipthereon that is shorter than the le hofsaiddie'f testimony whereof Ihave hereunto afi ifmf is mre RICHARD LESTER wrLcoX;

